This Infrared Thermometer allows for a simple, accurate non-invasive and non-contact temperature reading. Simply align the thermometer with the middle of the forehead and press the scan trigger to take a temperature measurement. After the measurement has been taken there is a clear beep, beep, beep indication to confirm that is has been completed successfully. There is a large, clear colour coded, backlit, LCD display showing green for no fever, yellow for a slight fever and red for a high fever, along with the reading taken. The unit records the last 50 readings taken and is switchable between Celsius and Fahrenheit. In order to save battery life, it has an auto off function after 18 seconds without use. Colour varies.